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CV Tools User Manual Rev 1.5

1. uoseAouAS ZSS peog dwy sjooL AD LEVELS 1 3 are zero d all LEDs off Monitor with a DMM Accurate CV source e g A 190 MIDI CV LEVEL 4 fully clockwise at 10 MIN MAX SLEW LIMITER Copyright 2011 Synovatron Electronic Music All rights reserved Rev 1 5 October 2011 CV Tools User Manual CV Tools Specification 4 channel Polarizing Cascade Mixer Channel 1 Input 3 5mm jack INI Input impedance 100kQ 1 Normalled input VREF jumper selectable to 5V 0 5V 2 5V or none Bandwidth DC 15kHz 3db Gain LEVEL control variable 0 to 2 3 Output 3 5mm jack OUT1 Normalled to Channel 2 output mixer Output impedance 1kQ 1 Output indication LEDs Channel 2 Input 3 5mm jack IN2 Input impedance 100kQ 1 Normalled input VREF jumper selectable to 5V 0 5V 2 5V or none Bandwidth DC 15kHz 3db Gain LEVEL control variable 0 to 2 3 Output 3 5mm jack OUT2 Normalled to Channel 3 output mixer Output impedance 1kQ 1 Output indication LEDs Channel 3 Input 3 5mm jack IN3 Input impedance 100kQ 1 Normalled input VREF jumper selectable to 5V 0 5V 2 5V or none Bandwidth DC 15kHz 3db Gain LEVEL control variable 0 to 2 3 Output 3 5mm jack OUT3 Normalled to Channel 4 output mixer Output impedance 1kQ 1 Output indication LEDs Copyright 2011 Synovatron Electronic Music All rights reserved Rev 1 5 October 2011 CV Tools
2. or set for best compromise across all channels and positions 0 5V to 2 5V reference The 0 5V to 2 5V reference is used for fine offset adjustments and is factory set to 1 00V giving a 2V maximum offset capability However this can be set as desired by the user within the range 0 5V to 2 5V to give maximum offsets of between 1V and 5V Measure the voltage on J2 pin 10 with respect to OV on J2 pin 5 Adjust RV8 for a DMM reading as required Reconnect the ribbon cable to J2 Adjust RV8 Measure J2 pin 10 with respect to as required OV on J2 pin5 A 100 BUS J1 1 LLOZ uoseAOUAS z Z SS peog dwy sjoo AD N S GAIN JP 4 fmo a em 7 GAIN AVG 5VREF BC Alternative method This alternative method uses front panel connections only and no ribbon cable disconnections are required Again jumpers need to be set appropriately the channel being adjusted must have its input voltage reference jumper set to 0 5V to 2 5V position This adjustment assumes channel 1 but channel 2 or 3 or none if this feature is not required can be used as well Set LEVEL 1 control to 10 Connect a patch lead to OUT1 Measure the voltage on the patch lead tip with respect its screen Adjust RV8 for a DMM reading as required 1 00V to 5 00V your choice Copyright 2011 Synovatron Electronic Music All rights reserved Rev 1 5 October 2011 CV Tools User Manual Note again that this sets Channel 1 accurately in the 10 position but there wi
3. 0 bus CV position The factory pre set position is a gain of 2 the same as the fixed gain on channels 1 to 3 As shown below the 2 denotes a fixed gain of 2 and 1V OCT denotes an adjustable gain of 1 EXP J4 I P BRD Je 1 A 100 BUS J1 L LOZ UOIJeAouUAS fo ZSS pleog dwy sjool Ad N S GAIN JPE 1 PAS AUZ GAIN AVE 5vREF Copyright 2011 Synovatron Electronic Music All rights reserved Rev 1 5 October 2011 CV Tools User Manual Connection Instructions Ribbon Cable The supplied ribbon cable connection to the module should always have the red stripe at the bottom to line up with the pin 1 marking on the CV Tools Amp Board s J1 A 100BUS connector The same for the other end of the ribbon cable that connects to the modular synth racks power connector The red stripe must always go at the bottom CV Tools Amp Board Iss 1 Synovatron 2011 16 way cable connector pin out di wT daxa Loy Bus board pin out RHB Gate RH cv EHH 5v MHJ 12v BH ov GE ov OE ov BH 12v Viewed from pins Red wire pin 1 Getting this wrong may damage your CV Tools module and possibly your synth too so please always double check that you have got it right If in doubt don t power up and get advice Always change fit or remove modules with the synth s power switched off and disconnected from the mains supply for your own safety Copyright 2011 Synovatron Electroni
4. 11 CV Tools User Manual ES VCO CV mixer This example uses channel 4 set to unity gain and the A 100 bus CV routed through it see jumper settings Channel 3 is configured for a 5V VREF to give a coarse tune control whilst channel 2 is configured for 0 5V VREF to give a fine tune control Channel 1 has an LFO connected to provide vibrato The output is routed via the Slew Limiter to give a portamento sound on the VCO 3Hz LFO sine Controls vibrato wave 5V amount No input just rf Coarse VCO 5V Vref tune control No input jumper a Fine VCO tune set for 0 5V Vref 7 control No input jumpers set for CV Vref and channel gain of 1 CV TOOLS App SUBTRACT SCALE INVERT OFFSET LEVELS e Composite of No input OUT4 A 100 bus CV normalled to 3 tuning vibrato Slew IN MIN MAX and portamento SLEW LIMITER SYNOVATRON Sa Note that routing via the very low output impedance Slew Limiter ensures the VCO does not load the CV causing scale errors Other examples may also be posted from time to time on the blog at http synovatron blogspot com Please send any clever patches to synovatron btinternet com and they may get featured on the blog Copyright 2011 Synovatron Electronic Music All rights reserved Rev 1 5 October 2011 CV Tools User Manual Jumper Settings Input Board The Input Board has four jumpers JP1 to JP4 These select the options for normall
5. CV Tools User Manual MIN MAX SLEW LIMITER Copyright 2011 Synovatron Electronic Music All rights reserved Rev 1 5 October 2011 CV Tools User Manual ELECTRONIC MusiC Introduction Thank you for purchasing the Synovatron CV Tools Module This manual explains what the CV Tools Module is and how it works The CV Tools Module is a 12HP 60mm wide Eurorack analogue synthesizer module and is compatible with the Doepfer A 100 modular synthesizer bus standard The CV Tools Module is a versatile voltage processor intended for control voltage manipulation such as adding subtracting attenuating amplifying and offsetting It can also be used with audio and gate signals to great effect Caution Please ensure you use the CV Tools Module in accordance with these instructions especially taking great care to connect the ribbon cable to the module and the power bus correctly Always double check equipment damage and will invalidate the warranty A Reversing or misconnecting the bus connector can result in Only fit and remove modules with the rack power off and A disconnected from the mains electricity supply for your own safety Refer to the connection section for ribbon cable connection instructions Synovatron Electronic Music cannot be held responsible for any damage or harm caused through incorrect or unsafe use of this module If in doubt stop and think If you are still unsure of what to do then please contact Synova
6. User Manual Channel 4 Input 3 5mm jack IN4 Input impedance 100kQ 1 Normalled input VREF jumper selectable to 5V A 100 Bus CV or none Bandwidth DC 15kHz 3db Gain LEVEL control variable O to 2 3 or 1 set by RV7 with LEVEL control fully clockwise jumper selectable Output 3 5mm jack OUT4 and Slew Limiter input Output impedance 1kQ 1 Output indication LEDs Slew Limiter Input 3 5mm jack IN Input impedance 1MQ 1 Normalled input Channel 4 output OUT4 Slew range 0 5ms 1000ms Gain 1 Output 3 5mm jack OUT Output impedance 00 General Dimensions 3U x 12HP 128 5mm x 60 6mm depth 52mm Power consumption 12V 20mA max 12V 18MA max 5V is not used Reference voltage VREF Jumper selectable at each mixer input Channels 1 3 5 00V set by RV6 0 5V 2 5V set by RV8 Channel 4 5 00V set by RV6 CV from A 100 bus A 100 Bus utilisation 12V OV CV used 5V and Gate are not used Contents CV Tools Module 200mm 16 way ribbon cable 4 sets of M3 cap head socket screws nylon washers and a 2 5mm hex key Copyright 2011 Synovatron Electronic Music All rights reserved Rev 1 5 October 2011 CV Tools User Manual Environmental RoHS All components used on the CV Tools Module are RoHS compliant To comply with the WEEE Directive please do not discard into landfill please recycle all Waste Electrical and Electronic Equipment responsibly please contact Sy
7. ariable DC offset voltage if no patch lead is connected refer to Input Board jumper settings Here are a few simple examples to demonstrate the principles Two 2 channel mixers This shows that by using two output patch leads that two 2 channel mixers can be configured OUT2 adds the offset applied to IN1 to the bipolar LFO signal to give a O to 10V signal suitable for a clock or gate signal A VCO s square wave and ramp waveforms are connected to IN3 and IN4 the levels are adjusted to effectively provide a ramp of twice the frequency at OUT4 CV TOOLS bad No input just 5V Vref LFO square Square wave wave 5V clock 0 to 10V 100Hz VCO square wave 5V 100Hz VCO 200Hz VCO ramp 5V ramp 5V Copyright 2011 Synovatron Electronic Music All rights reserved Rev 1 5 October 2011 CV Tools User Manual Ea Single channel level controls This example uses each channel as separate level or offset controls The top two channels are used as DC voltage generators and the lower two are used as signal attenuators each channel is independent here CV TOOLS App SUBTRACT SCALE INVERT OFFSET 0 LEVELS No input just 10V DC 5V Vref No input just 1VD 5V Vref ae 100Hz VCO 100Hz square square wave wave 1V 5V e 100Hz VCO 2 Attenuated gt MIN MAX SLEW LIMITER Copyright 2011 Synovatron Electronic Music All rights reserved Rev 1 5 October 20
8. c Music All rights reserved Rev 1 5 October 2011 CV Tools User Manual Adaptors If you want to use the CV Tools Module but have an Analogue Systems rack especially the older type with no Doepfer style sockets then Synovatron has an adaptor specially designed for this please contact Synovatron for details Note that Analogue Systems connectors do not support the bussed CV connection this is left open circuit on the adaptor Synovatron Doepfer Module to Analogue Systems Bus DM2ASB Adaptor Front Panel Fixings The CV Tools Module comes with M3 cap head socket screws nylon washers and a 2 5mm hex key The cap head socket screws look great and are very easy to fit using the supplied hex key the nylon washers help protect the front panel If you like the way they look and want to do the rest of your synth the Same way then please contact Synovatron Copyright 2011 Synovatron Electronic Music All rights reserved Rev 1 5 October 2011 CV Tools User Manual Adjustments The voltage reference and gain adjustment pots are on the main amplifier board These adjustments should only be performed by a suitably qualified person The adjustments can be performed using a Digital Multi Meter DMM and small screwdriver or trim tool as follows 5V reference The 5V reference is used for coarse offset adjustments and is factory set to 5 00V giving a 10 0V offset capability This adjustment affects the 0 5V to 2 5V setting s
9. ed The object of jumper selectable normalled inputs is to give the user some flexibility for setting channel offsets a coarse range 5V gives 10V swing a fine range 0 5V 2 5V gives 1V to 5V swing and in the case of channel 4 the option for a calibrated CV path A very useful feature of each channel and because each channel can be used separately is the level indication LEDS marked and These indicate the voltage level present on each output The green LED illuminates when there is a negative voltage present the red LED illuminates when there is a positive voltage present If neither LED is illuminated the output is close to zero volts conversely if both are illuminated there is an AC signal present that is fast enough not to see it flashing between red and green LEDs The LEDs allow a channel to be used to scope the level on any applied es patch lead by simply setting the LEVEL control to anywhere clockwise of 0 10 would give the most sensitive response Don t forget that OUT2 Copyright 2011 Synovatron Electronic Music All rights reserved Rev 1 5 October 2011 CV Tools User Manual to OUT4 may include summed signals from other channels so put a patch lead in the preceding channel s output to make sure you only see one channel s activity JL Trig M Pos 3 000us eS CHT It is possible to overdrive any Rise Time ct A eee OS NG 36 80 channel into clipping eit
10. ed inputs to IN1 to IN4 IN1 to IN3 can each have their normalled inputs set to 5V a user settable voltage of 0 5V to 2 5V or none See adjustments section IN4 can have its normalled input set to 5V A 100 bus CV or none As a guide the 5V setting provides an offset capability of 10V as channels have a gain of 2 this is mainly used for offsetting large signals like ADSR envelopes or LFO waveforms and is especially good for forcing signals into clipping The 0 5V to 2 5V setting is for much finer adjustment e g you may want a variable DC to provide an octave tuning range for a Doepfer A 110 VCO The CV position on channel 4 routes the CV signal available on the A 100 bus to IN4 The none settings are if you don t want an offset capability on all channels To set to none place the jumper on any one pin but leave the other jumper socket disconnected or you could just remove it but it might get lost The factory pre set jumper positions are all 5V as shown below _ 4 tL ou Synovatron 201 Input Board Copyright 2011 Synovatron Electronic Music All rights reserved Rev 1 5 October 2011 CV Tools User Manual Amplifier Board The Amplifier Board has one jumper JP1 marked GAIN This selects the gain options for channel 4 The options are a gain of 2 or an accurately settable gain of 1 called unity gain Generally this will be set to unity gain if IN4 s normalled input jumper is set to the A 10
11. her LA K ff NN Sa positive negative or both positive and negative clipping is possible This can be a great way of creating 3 harmonics In this image the sine dae ek wee aa has been offset to clip the top and esis stage Bigs ta a 4 v then offset back to 5V by a fiini N fbn EEE subsequent channel iat igen Lewis ial a IE SS eee ee Re ee ee T ee ae ot oS ern heey i we T S fa Me eS Bt ie ee ee ed J EKES u ee Oe eee CC Oe ra ee COC rc Slew Limiter Section This is a very low frequency low pass filter where the cut off frequency is set by the TIME control The purpose is to slow down control voltage changes so that the output slews from one level to another rather than stepping from one to another Musically this would be used to add portamento to a VCO control MIN MAK 4 voltage one pitch blending into SLEW LIMITER the next This is also called lag or glide on other synthesizers In the MIN position there is no noticeable slewing but in the MAX position it takes about one second to ramp up or down to the next voltage step As this function is mainly intended for slewing CVs for VCOs it is important that this does not change the scale or volts octave of the CV signal therefore the input is buffered and has a very high input impedance 1MQ and the output is also buffered to give a very low output impedance in order to prevent any scale errors or signal distortion due to the loading effects of the large Ca
12. ll be small gain differences on the other channels and at 10 positions so check the other channels and positions in a similar way remembering to disable the preceding channel s output by inserting patch lead in the output above the channel of interest This adjustment can be performed on any channel but they cannot be independently adjusted there is only one adjustment Either set one channel and position accurately or set for best compromise across all channels and positions Channel 4 gain Channel 4 can be set to have a gain of 2 or 1V Octave The 1V Octave gain can be adjusted as follows Set jumper JP1 to the 1V OCT position as shown Apply an accurate CV source e g MIDI CV module such as the Doepfer A 190 to IN4 using a patch lead Set channel 4 LEVEL fully clockwise to 10 position Set LEVELs 1 3 to O so that OUT1 OUT3 LEDs are off Monitor OUT4 with a DMM connected via a patch lead Set the CV source to change by exactly 1V e g if using a MIDI CV adaptor with a MIDI keyboard press the lowest C note and then press C one octave up By alternately going between octaves adjust RV7 for a change of exactly 1 000V repeat as many times as necessary Return JP1 to the 2 position for a channel gain of 2 or leave as is for an accurate channel gain of 1 Copyright 2011 Synovatron Electronic Music All rights reserved Rev 1 5 October 2011 CV Tools User Manual iY Adjust RV7 to give Set JP1 as shown a gain of 1 00 LLOZ
13. nel 1 jumper settings more on that later This example shows that channel 1 can be used as a reference voltage generator whilst the remaining three channels can be used for other things all the possibilities will be explained later Copyright 2011 Synovatron Electronic Music All rights reserved Rev 1 5 October 2011 CV Tools User Manual The second main difference is that it is a polarizing mixer which allows an input signal s level to be adjusted or inverted Each channel has a basic gain of 2 and therefore an input signal can amplified by up to a factor of 2 or inverted and amplified by up to a factor of 2 i e 2 This is useful for adding and subtracting signals in varying degrees Channels 1 4 have jumper selectable normalled inputs There are three jumper selectable options for channels 1 3 option 1 is 5 00V option 2 is a user set voltage reference of 0 5V 2 5V or option 3 is no connection Each channel can be set separately Channel 4 has slightly different options for its normalled connection option 1 is a user set voltage reference of 0 5V 2 5V option 2 is the A 100 bus CV signal or option 3 is no connection The gain for channel 4 is also jumper selectable between a gain of 2 and an accurately set unity gain gain of 1 This allows the normalled A 100 bus CV signal to pass through with unity gain when the LEVEL control is set to 10 This will allow an accurate CV of 1V Octave to be added to the mix if requir
14. novatron to return the CV Tools module for disposal if required Warranty The CV Tools Module is guaranteed against defective parts and workmanship for 12 months from date of purchase Note that any physical or electrical damage due to misuse or incorrect connection invalidates the warranty A low cost repair service will be available for any repairs outside of warranty conditions Quality The CV Tools Module is a high quality professional audio device that was lovingly and carefully designed built tested in the United Kingdom by Synovatron Electronic Music Please be assured of my commitment to providing good reliable and usable equipment Any suggestions for improvements will be gratefully received Thank you and happy music making Tony Contact details Tony Steventon Synovatron Electronic Music 104 Twyford Avenue Portsmouth PO2 8D UK M 44 0 7889 053435 T 44 0 2392 669339 E Synovatron btinternet com W http synovatron blogspot com Copyright 2011 Synovatron Electronic Music All rights reserved Rev 1 5 October 2011 CV Tools User Manual Sy ce EU DECLARATION OF CONFORMITY Tony Steventon T A Synovatron Electronic Music 104 Twyford Avenue Portsmouth PO2 8DJ UK T 02392 669339 M 07889 053435 E synovatron btinternet com W http synovatron blogspot com Product Description CV Tools Module hereby declare that this product conforms to the essential requirements of the Elec
15. o always do the adjustments in this order Disconnect the ribbon cable from J2 Measure the voltage on J2 pin 11 with respect to OV on J2 pin 5 Adjust RV6 for a DMM reading of 5 00V Measure Vref on J2 pin 11 with Adj RV6 f respect to OV on J2 pin 5 for 5 00V djust RV6 for 5 00V LLOZ uosyeAOUAS Z SS pueog duly sjoo AD Alternative method This simple alternative method uses front panel connections only and no ribbon cable disconnections are required However jumpers need to be set appropriately the channel being adjusted must have its input voltage reference jumper set to 5V position hence ensure JP1 on the Input Board is set to 5V for this next step Set LEVEL 1 control to 10 Connect a patch lead to OUT1 Measure the voltage on the patch lead tip with respect its screen Adjust RV6 for a DMM reading of 10 00V Copyright 2011 Synovatron Electronic Music All rights reserved Rev 1 5 October 2011 CV Tools User Manual Note that this sets Channel 1 accurately in the 10 position but there will c5 be small gain differences on the other channels and at 10 positions so check the other channels and positions in a similar way remembering to disable the preceding channel s output by inserting patch lead in the output above the channel of interest This adjustment can be performed on any channel but they cannot be independently adjusted there is only one adjustment Either set one channel and position accurately
16. pacitance required to cause a slow slew rate amp Note that OUT4 is normalled to the Slew Limiter s input Copyright 2011 Synovatron Electronic Music All rights reserved Rev 1 5 October 2011 CV Tools User Manual Examples The 4 channel polarizing mixer section is very versatile and can be configured in numerous ways just by patch lead connections Here s a table of what can be done with just output patch leads Patched Outputs Configuration Channels 2 to 4 are unused Channels 3 and 4 are unused Channels 3 and 4 are unused Channel 4 is unused OUT1 and OUT3 Channel 1 forms a single channel level control Channels 2 and 3 form a two channel mixer Channel 4 is unused OUT2 and OUT3 Channels 1 and 2 form a two channel mixer Channel 3 forms a single channel level control Channel 4 is unused OUT3 controls Channel 4 is unused OUT4 Channels 2 to 4 form a three channel mixer and 4 form a two channel mixer See example OUT4 Channels 3 and 4 form a two channel mixer Channel 4 forms a single channel level control OUT4 Channels 2 and 3 form a two channel mixer OUT4 and 4 form two single channel level controls and OUT4 controls See example Copyright 2011 Synovatron Electronic Music All rights reserved Rev 1 5 October 2011 CV Tools User Manual In addition each level control or mixer channel can be used to either act upon a signal applied via a patch lead to an input or can provide a v
17. tromagnetic Compatibility EMC Directive 2004 108 EC Harmonized EMC Standards applied a Emissions EN 61000 6 3 2007 A1 2011 Signal amp control lines Jack inputs amp outputs EN 55022 2010 Class B Conducted RF 0 15 0 5MHz 40dBuA 30dBuA quasi peak EN 55022 2010 Class B Conducted RF 0 15 0 5MHz 30dBuA 20dBuA average EN 55022 2010 Class B Conducted RF 0 5 30MHz 30dBuA quasi peak EN 55022 2010 Class B Conducted RF 0 5 30MHz 20dBuA average Immunity EN 61000 6 1 2007 Enclosure port Module front panel EN 61000 4 3 2006 A2 2010 RF EM field 80 1000MHz 3V m 80 AM 1kHz EN 61000 4 2 2009 ESD Contact discharge 4kV Air discharge 8kV Date CE Mark first applied 18 04 2011 Signed IZD ZA Tony Steventon Copyright 2011 Synovatron Electronic Music All rights reserved Rev 1 5 October 2011
18. tron for advice before proceeding Copyright 2011 Synovatron Electronic Music All rights reserved Rev 1 5 October 2011 CV Tools User Manual CV Tools Description The CV Tools Module has two main sections as follows 4 channel Polarizing Cascade Mixer Section Essentially this is a 4 channel mixer but with two main differences App SUBTRACT SCALE INVERT OFFSET The first and most significant 0 VFI difference is that it has a cascade architecture which unlike a Standard mixer that simply sums all four inputs into one output has a summing stage at each of the outputs OUT2 OUT3 and OUT4 denoted by the 2 symbol So OUT1 is added to OUT2 OUT2 is added to OUT3 and OUT3 is added to OUT4 Consequently OUT1 is just from channel 1 OUT2 is the sum of channels 1 and 2 OUT3 is the sum of channels 1 2 and 3 and OUT4 is the sum of all four channels However when a patch lead is plugged into any or all of outputs OUT1 to OUTS it disconnects that output from the next channel s output summing stage Example A patch lead plugged into OUT1 will ensure that whatever signal is output on OUT1 will not be added to OUT2 So channel 1 becomes a single gain inversion channel and in this example with nothing plugged into IN1 the output on OUT1 will simply be the normalled VREF modified by the position of the LEVEL control i e a variable DC voltage reference that could be set to anywhere between 10V and 10V depending on chan

CV Tools User Manual Rev 1.5

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